Heat detector

Abstract

A heat detector ( 1 ) includes: a detection portion ( 2 ) which is exposed to a monitoring area ( 12 ) and detects heat; a guard structure ( 7 ) which is provided around the detection portion ( 2 ) and protects the detection portion ( 2 ) from an external force on the side of the monitoring area ( 12 ); and an indicator lamp ( 4 ) which performs a display relating to the heat detector, wherein in the indicator lamp ( 4 ), at least a part includes a planar visible portion ( 42 ) inside the guard structure ( 7 ) and around the detection portion ( 2 ) and at least a part of the visible portion ( 42 ) is visible from the side of the monitoring area ( 12 ) over the guard structure ( 7 ).

What is claimed is: 
     
       1. A heat detector comprising:
 a detection portion which is exposed to a monitoring area and detects heat; 
 a guard structure which is provided around the detection portion and protects the detection portion from an external force on the side of the monitoring area; and 
 an indicator lamp which performs a display relating to the heat detector, 
 wherein at least a part of the indicator lamp includes a planar visible portion that is either: 
 inside the guard structure and around the detection portion in plan view and at least a part of the visible portion is visible from the side of the monitoring area over the guard structure; or 
 disposed in an area protected by the guard structure and at least a part of the planar visible portion is exposed while not overlapping the guard structure in plan view, and 
 wherein the heat detector further comprises: 
 a mounting board to which the detection portion is electrically connected, wherein the indicator lamp includes a light source device which is electrically connected to the mounting board, and wherein the visible portion displays light projected from the light source device; and 
 a cover portion which is provided between the mounting board and the guard structure, wherein the cover portion is provided with an opening that exposes the visible portion. 
 
     
     
       2. A heat detector comprising:
 a detection portion which is exposed to a monitoring area and detects heat; 
 a guard structure which is provided around the detection portion and protects the detection portion from an external force on the side of the monitoring area; and 
 an indicator lamp which performs a display relating to the heat detector, 
 wherein the indicator lamp includes a planar visible portion that is either: 
 inside the guard structure and around the detection portion in plan view and at least a part of the visible portion is visible from the side of the monitoring area over the guard structure; or 
 disposed in an area protected by the guard structure and at least a part of the visible portion is exposed while not overlapping the guard structure in plan view, and 
 wherein a waterproof material is provided between the detection portion and the visible portion. 
 
     
     
       3. The heat detector according to  claim 1 ,
 wherein the visible portion is configured by a part of a plate-shaped member including a transparent or opaque light diffusion portion, and 
 wherein the light diffusion portion is disposed to overlap the mounting board in plan view. 
 
     
     
       4. The heat detector according to  claim 3 , wherein the light diffusion portion is disposed to surround the detection portion. 
     
     
       5. The heat detector according to  claim 1 , wherein at least a part of each of the side of the guard structure facing the visible portion and the cover portion has a color capable of reflecting visible light emitted from the indicator lamp. 
     
     
       6. The heat detector according  claim 1 ,
 wherein a waterproof material is provided between the detection portion and the visible portion. 
 
     
     
       7. The heat detector according to  claim 6 , wherein the waterproof material is an adhesive. 
     
     
       8. The heat detector according to  claim 7 , further comprising:
 a mounting board to which the detection portion is electrically connected, 
 wherein a cover portion is provided between the mounting board and the guard structure, 
 wherein the cover portion is provided with an opening that exposes the visible portion, 
 wherein the visible portion is provided with a groove portion into which the adhesive is injectable, and 
 wherein the groove portion reaches between the detection portion and the visible portion and reaches the cover portion. 
 
     
     
       9. A heat detector comprising:
 a detection portion which is exposed to a monitoring area and detects heat; 
 a guard structure which is provided around the detection portion and protects the detection portion from an external force on the side of the monitoring area; and 
 an indicator lamp which performs a display relating to the heat detector, 
 wherein at least a part of the indicator lamp includes a planar visible portion that is either: 
 inside the guard structure and around the detection portion in plan view and at least a part of the visible portion is visible from the side of the monitoring area over the guard structure; or 
 disposed in an area protected by the guard structure and at least a part of the planar visible portion is exposed while not overlapping the guard structure in plan view, and 
 wherein the heat detector further comprises: 
 a mounting board to which the detection portion is electrically connected, 
 wherein a packing is provided between the visible portion and the mounting board. 
 
     
     
       10. The heat detector according to  claim 2 , further comprising:
 a mounting board to which the detection portion is electrically connected, 
 wherein the indicator lamp includes a light source device which is electrically connected to the mounting board, and 
 wherein the visible portion displays light projected from the light source device. 
 
     
     
       11. The heat detector according to  claim 10 ,
 wherein the visible portion is configured by a part of a plate-shaped member including a transparent or opaque light diffusion portion, and 
 wherein the light diffusion portion is disposed to overlap the mounting board in plan view. 
 
     
     
       12. The heat detector according to  claim 11 , wherein the light diffusion portion is disposed to surround the detection portion. 
     
     
       13. The heat detector according to  claim 10 , further comprising:
 a cover portion which is provided between the mounting board and the guard structure, 
 wherein the cover portion is provided with an opening that exposes the visible portion. 
 
     
     
       14. The heat detector according to  claim 13 , wherein at least a part of each of the side of the guard structure facing the visible portion and the cover portion has a color capable of reflecting visible light emitted from the indicator lamp. 
     
     
       15. The heat detector according to  claim 2 , wherein the waterproof material is an adhesive. 
     
     
       16. The heat detector according to  claim 15 , further comprising:
 a mounting board to which the detection portion is electrically connected, 
 wherein a cover portion is provided between the mounting board and the guard structure, 
 wherein the cover portion is provided with an opening that exposes the visible portion, 
 wherein the visible portion is provided with a groove portion into which the adhesive is injectable, and 
 wherein the groove portion reaches between the detection portion and the visible portion and reaches the cover portion. 
 
     
     
       17. The heat detector according to  claim 2 , further comprising:
 a mounting board to which the detection portion is electrically connected, 
 wherein a packing is provided between the visible portion and the mounting board.